American defence officials have confirmed a Calgarian who took up arms with the Islamic State was killed over two years ago.

An official with the U.S. Central Command public affairs office confirmed to Postmedia that Farah Mohamed Shirdon — who in 2014 fled to Syria and in the process became a de facto spokesman of the notorious terror organization — was killed in July 2015 in Mosul, Iraq.

News of the 24-year-old's death confirms what many had suspected of the Calgarian's fate, who came to prominence three years ago when he burned his Canadian passport in an ISIS propaganda video, issuing threats of jihad against western nations.

"We are coming and will destroy you ... this is a message for Canada and for all America," said Shirdon in the 2014 video, who also went by the nom de guerre Abu Usamah as-Somali.

In Aug. 2014, numerous reports surfaced of his apparent death while fighting in Syria — allegations he disproved a month later when he reappeared on social media claiming to be in the ISIS stronghold of Raqqa.

Earlier this year, the U.S. State Department added Shirdon to their list of "Specially Designated Global Terrorists," calling him a prominent fighter, recruiter and fundraiser as well as a significant national security threat.

The April 19 decision also added Canadian Tarek Sakr to the most-wanted list — believed to be part of a group of Quebecers who left for Syria between 2011 and 2012.

Shirdon found himself on Interpol's most-wanted terrorist list in 2015 for leaving Canada to join a terrorist group, as well as participating in and instructing others to join a terrorist group.